Log Message:
2.5.1           2008/03/20
Update for draft-kucherawy-sender-auth-header-14.
Add "subject" to "should_signhdrs" per RFC4871 section 5.5.
Fix bug #SF1911328: Restore proper behaviour of SignHeaders and
OmitHeaders, broken in the prior release's configuration
overhaul.  Problem reported by Jason Molzen.
Fix bug #SF1912332: Fix parameters passed to db->open().  Problem
reported by Tony Earnshaw.
Fix bug #SF1912569: Initialize mutexes before entering test mode.
Patch from Kaspar Brand.
LIBDKIM: More boundary checking fixes in dkim_canon_selecthdrs().
Problem noted by Warren Horvath.
LIBDKIM: Fix bug #SF1820084: Return DKIM_STAT_MULTIDNSREPLY
if a DNS query returns multiple records.

2.5.2           2008/03/28
Preserve the sender's domain name outside of mlfi_eoh() as it's
now needed in mlfi_eom().  Problem noted by Andy Fiddaman.
Fix bug #SF1921873: Pass "-K" command line switch into the new
configuration handling code.  Problem noted by Al Smith.
TOOLS: Fix flags portion of the TXT record output by dkim-genkey.
Problem noted by Michael Carland.
BUILD: Fix bug #SF1922422: Fix linker problems when POPAUTH is
defined.